Abstract
The author presents the analytical and the graphical method for determination of the direction and of the stress in the rupture line on one side of the contact between two different non-cohesive media, provided that the following values are known : the shear angles of both media that are assumed to obey Coulomb's failure law, the dilatation angles of both media as well as the stress state and the direction of the failure line on the other side of the contact. The analytical solution has been deduced from the limiting equilibrium conditions for the prismatic contact element whose surfaces are formed by the strain characteristics of both media appearing in the narrow rupture zone in which-according to Bent Hansen-the line rupture develops. The graphical solution can be obtained by constructing the corresponding Mohr's stress circles. The analytical as well as the graphical solution can be used also in order to get the dilation angles provided that the directions of the rupture line at the contact and the magnitude of the normal stress in the contact were determined in appropriate model tests.
